I saw my aunt Liadan's mouth quirk up at the corner, but her eyes were deadly serious.

Through the steam, he thought he saw blue eyes flicker and the mouth quirk a little.

Her mouth quirks upward even farther, then twitches into a thin line before she continues.

Not one of his half-sneers or tight little mouth quirks, but a big broad smile like a child on Christmas Day.

He saw her mouth quirk in a partial smile beneath the stringy hair.

For some reason her idiotic response made the corners of his mouth quirk up.

He saw her mouth quirk a little.

A familiar smile lit his eyes and made the right corner of his mouth quirk upward.

The thought that she might be sleeping naked made his mouth quirk in a sudden grin that held no real amusement.

It was a cop-out answer, but it made Judy's mouth quirk.